This interface is for returning controls with objects returned
in NamingEnumerations.
For example, suppose a server sends back controls with the results
of a search operation, the service provider would return a NamingEnumeration of
objects that are both SearchResult and implement HasControls.
NamingEnumeration elts = ectx.search((Name)name, filter, sctls);
while (elts.hasMore()) {
Object entry = elts.next();
// Get search result
SearchResult res = (SearchResult)entry;
// do something with it
// Get entry controls
if (entry instanceof HasControls) {
Control[] entryCtls = ((HasControls)entry).getControls();
// do something with controls
}
}